L-Theanine with Suntheanine 150mg 90vc

  Promotes a relaxed state without drowsiness  
  Eases stress and everyday nervous tension 
  Promotes a positive mood and alertness 


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L-Theanine with Suntheanine

L-theanine with Suntheanine is an amino acid derived from green tea (produced in Japan) that is responsible for the relaxation-inducing effect of tea consumption. 

L-theanine is synthesized in the roots of tea plants and transported to the leaves, comprising about 2% of the total dry weight of green tea leaves. It is the ingredient that is responsible for both the taste and the relaxing effects of green tea.

Suntheanine® has been shown to promote an alert state of relaxation. This is characterized by an increase in alpha brain waves (signifying a relaxed, alert state) and a decrease in beta brain waves (signifying an awake, excited state of mind).

Suntheanine® may also improve sleep quality, enhance mental acuity and soothe away tension and nervousness.
Research shows that supplemental L-theanine crosses the blood-brain barrier within 30 minutes of intake and this is able to exert its effects directly on the brain.


Suntheanine® L-theanine is best known for its unique ability to promote relaxation without causing drowsiness.

  • Promotes a relaxed state without drowsiness
  • Takes effect within 30-40 minutes
  • Helps improve GABA (gamma amino butyric acid) levels. GABA is an inhibitory neurotransmitter important for nervous system function
  • Eases stress and everyday nervous tension
  • Promotes a positive mood and alertness
  • May enhance cognitive performance and promote attention to detail
  • Helps ease stress and everyday nervous tension


Research on L-theanine with Suntheanine :
Studies on test rats have shown even repeated, extremely high doses of theanine cause little to no harmful psychological or physical effects. Theanine showed neuroprotective effects in one rat study.
In one double-blind study illustrating L-theanine’s anti-stress effects, it was found that a single dose influences both psychological and physiological states under acute stress. This study gave 12 participants a mental maths task as an acute stressor. L-theanine intake resulted in lower levels of perceived stress during the maths task.
It seems L-theanine is an agent that is best used as a countermeasure to potential situations of nervousness and tension by supporting mental tranquility. Suntheanine® may normalize the body’s stress response and condition the body to handle stressful situations better.


* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Is Suntheanine safe for children?
L-theanine is a naturally occurring molecule that is present in the diets of children around the world where tea is a consumed and no concerns have ever been raised about its safety. Suntheanine, which is a purified form of the same amino acid found in green tea, has also been approved as a food ingredient and nutritional supplement in some countries for many years and in these countries it has a perfect safety record. There was a large double blind study recently done, in which 200mg of Suntheanine was consumed twice per day for six weeks in boys 8-12 years. No side effects were reported in any of these boys (Altern Med Rev 2011).

How much Suntheanine is too much?
Suntheanine can have noticeable benefits with doses as low as 50mg. However, for most adults, doses of 100mg to as much as 400mg or more are often used for greater effects. In doses of 400mg or greater, some people will experience some degree of drowsiness. This is advantageous if you are using Suntheanine to improve sleep quality, but it can be a problem during the day. Doses as high as 1000 mg of Suntheanine are safe but caution should be exercised if taking higher doses when you have to drive or operate machinery.

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